Table of Contents

Preface

This preface explains the objectives, intended audience, and organization of this guide and includes the conventions used in this manual.

Objective

This guide describes the Cisco CRS 8-Slot Line Card Chassis from a system point of view. This guide focuses on the hardware elements, including descriptions of most of the major assemblies, such as the power and cooling systems, the switch fabric, route processor, and modular services cards. It also provides background information and the basic theory of operation for this routing system.

This guide can be read as a supplement to the Site Planning Guide, Installation Guide, and the related software documents.

Audience

This guide is intended for service provider customers and Cisco installation partners who have substantial background in configuring router-based internetworks and experience with routers and Cisco IOS XR software. The system description provides a high-level introduction to the components and vocabulary used within the Cisco CRS 8-Slot Line Card Chassis product.

Document Organization

This system description contains the following chapters and appendixes:

“Overview,” provides an overview of the chassis architecture and hardware.

Document Conventions

This guide uses the convention where the symbol ^ represents the key labeled Control or Ctrl. For example, the key combination ^ z means hold down the Control key while you press the z key.

Command descriptions use these conventions:

Examples that contain system prompts denote interactive sessions, indicating the commands that you should enter at the prompt. The system prompt indicates the current level of the EXEC command interpreter. For example, the prompt router> indicates that you should be at the user level, and the prompt router# indicates that you should be at the privileged level. Access to the privileged level usually requires a password. Refer to the related software configuration and reference documentation listed in Related Documentation for additional information.

Commands and keywords are in bold.

Arguments for which you supply values are in italics.

Elements in square brackets ([ ]) are optional.

Alternative but required keywords are grouped in braces ({}) and separated by vertical bars (|).

Nonprinting characters, such as passwords, are in angle brackets (< >).

Default responses to system prompts are in square brackets ([]).

Exclamation points (!) at the beginning of a line indicate a comment line.

Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in this manual.

Timesaver Means the described action saves time. You can save time by performing the action described in the paragraph.

Caution Means
reader be careful. You are capable of doing something that might result in equipment damage or loss of data.

IMPORTANT SAFETY INSTRUCTIONS

Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071

SAVE THESE INSTRUCTIONS

Related Documentation

For complete planning, installation, and configuration information, see the following documents:

Added modular power configuration information and graphics. Added CRS-1 and CRS-3 information. Also added technical updates and made minor editorial changes. Power architecture diagrams were updated.

October 2010

Added information about the new MSC140 and FP140 line cards, CRS-8-FC/s and CRS-8-FC140/S switch fabric cards, 14-port and 20-port 10-GE PLIMs, and the 1-port 100-GE PLIM. Minor editorial and technical changes were also made.

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